Double-disk scraper



H. B. BOZARD.

DOUBLE DISK SCRAPER.

APPLICATION FILED car. 10. 1918.

1,410,883. Patented Mar; 28,- 1922.

I M 1, a v fi F T LT HARRISON ."B. BOZARD, 0F HAMILTON, ONTARIO,

CANADA, AssreNon, BY MnsNE ASSIGNMENTS, TO INTERNATIONAL HARVESTER COMPANY, OF CHICAGO, ILLI- NOIS, A CORPORATION OF NEW JERSEY. a

'DOUBLE-DISK scnAPnn.

Application fired October 10,1918. [serial No. 257,560.

To all whom. it moiy 00mm.- Be it known that I, HARRISON B. BOZARD, a citizen of the United States, residing at Hamilton, in the county of Wentworth and Province of Ontario, Dominion of Canada, haveinvented certain new anduseful Im provements in Double-Disk Scrapers, of Which the following is a full, clear, and exact specification. 5 j i This invention relates to scrapers for double disk drills. e e j The object of the invention is to scrape the mud and. dirt from the inner surfaces of double disk drills so that these foreign substances will not interfere with the proper working of the implement. U h V A further object is to provide an improved scraper thatwill have at all times a proper bearing contact with the inner surfaces of the disks and will perform the scraping function with less Wear than has heretofore been possible.

. tion ofthe boot illustrating the A further object is to provideacombination of adjustable scrapers formed in such a manner that the entire inner surfaces of the disks will b thoroughly scraped and cleared of all mud and dirt. e

These objects are attained in the present instance by providing a plurality of adjustable scrapers, the scrapers being so formed that they will have the proper bearing' contact with th inner disk surfaces, and also in such a manner that they maybe adjusted to take up the slight wear that occurs, the wear in the scrapers employed being much less than that ordinarily experienced.

In the accompanying drawings I have illustrated one embodiment of my invention,

and in these drawings-- Figur l shows in perspective a grain drill boot with my improved scrapers secured thereto, one of the disks of. the double disk drill being omitted from the showing in or der to clearly show the construction ofthe scrapers; j m

Fig. 2 isa side elevationof the rear por-v mounting of one of the, scrapers; and

Fig. 3 is'a bottom plan view of the double disk drill having the improved scrapers thereon. f W In the constructionillustrated the boot 10 i is of the usual construction and has a forwardly projecting. portion 11 which is secured by drag bars to the transporting frame, arearwardly projecting portion 12 and an inwardly projecting bearing stem 13 The disks 14, one of which is illustrated, maybe secured to the bearing stem in any suitable manner. The stem 13 has formed on its rearside a fiangedportion 15 and this flange 1s cut away as shown at16 adjacent the rearwardly extending. portion 12 of the boot in order to provide clearance and allow accumulations, of, dirt which break away from the outer scraper hereinafter described, to passwithout cl accumulations will be removed upon the succeeding revolutionof the disk. The flange portion 15 of the bearing stem is provided with adjustable scrapers 17 which are se- Specification of Letters Patent. Patented Mar. 28, 1922- i i oggingthe disks. These 1 cured to the bearing stem by means of screws a scraper 21 preferably formed :with chilled edge, portions 22, is adjust-ably secured by means of a screw 23 to the curved tail portion 19of the rearwardly extending portion ofthe boot. The screw '23 passes through th slot 24 in thescraper and is spaced fromthe scraper by means of a washer 25. In this manner the scraper is longitudinally adjustable on the tail .19 o-f'the boot; The upper portion of the scraper iscurved transversely, to conform tothe curvature of the rib 20, and his portion bears against the rib 20,the bearing. contact ofthe scraper withthe tail portion being limitedto the upper end which bears against the rib 20and a portion which is immediately adjacent the securing screw scraper free to move with-respectto thGrlOWP remov all trash and dirt from 23, .Thisleaves :thelower portion of the r upper. edge of the scraper is notched as shown at 26 to position the drag chain in its In working out the longitudinalcurvature of the scraper I have found the most satisfactory construction to be that illustrated in the drawings wherein the portion' of the scraper between the points 27 and 28 is curved and the remaining portion between the points 27 and 29 is substantially straight, and fiat, or disposed in a single plane.

In order to provide a properand efficient bearing contact betweenthis scraper and the outer portion of the inner surfaces of the disks,fI have/found it advisable toprovide a longitudinal recess or slot 30 at the extreme lower end ofthe scraper, this recess forming a forked or bifurcated end portion on the scraper, the bifiircations 31.and 32 being laterally resilient in order to enable the scraper to conform closely'to the inner surfaces cf the disks.

.' From the above description it is believed" that'the' operation of the improved construction will be clear, but the following brief I I free to vibrate toward and from the tail description will be given.' y w The disks rotate in the direction of the arrow shown in Fig. 1, and after the scrapers 17' and the scraper 21 have been a'djusted to proper bearing contact with the inner surfaces of the disks, upon rotation the scrapers l7 will remove the dirt and mud from the inner portions of the inner surfaces and the scraper 21 will remove the foreign substances from the outer portion of the inner surfaces. Any material that is forced outwardly toward the periphery of the" disk bythe scrapers 17 after the action of the scraper, 21, will pass through the clearance space 16 formed on the bearing stem and will be engaged by the scraper. 21 upon the next succeeding revolution. By providing a scraper 21 having itslower end portion 19 of theboot, and also by providingthis scraper with a bifurcated lower end and a substantially fiat end portion, a construction has been provided which will conform very closely to the inner surfaces of the disks and will be maintained inpropei'" bearing contact therewith.

By chilling the outer edges 22 cf the scraper 21, I have greatly increased the life of; the scraper and decreased the wear.

' From the above description it will be seen that a simple and eflicient construction has been provided, and a construction that will satisfy all the requirements and will perform the functions witha'miniinuln'amount of wear." j

While I havein' the? above specification described 'ofie embodirfieirt, er invention; it-will be' understeoathat the inventibn is 1. In combination, a grain drill boot hay-- ing a curved tail portion, and a scraper secured to said tail portion and extending beyond the-same, the portion of the scraper beyond the securing means beingfree to vibrate toward and fromthe end portion of the tail of the boot.

2. In combination, a grain dr ll bootuhav; ing a rearwardly extending portion, a transverse rib being formed-on said rearwardly extendingv portion near the free end thereof,

and a scraper secured to said rearwardly extending portion and having its upper free end bearingagainst said transverse rib.

3, A scraper for double disk grain'drills having a notch at one end for the reception of a drag chain.

4:. A scraper for double disk grain drills having its upper portionlongitudinally and transversely curved and its lower end bifurcated and formed ofresilient material;

5.'A-scraper for double disk grain drills having its upper portion longitudinally and transversely curved and its lower portion substantially flat. I i

6. A scraperfor double disk grain drills having a notch at one end for the reception of a drag chain andhavi'ng its other end bifurcated, said scraper. beingv formed of resilient material.

7. A scraper for double. disk grain drills having a portion curved longitudinally and he remaining'portion substantially flat, .the flat portion being bifurcated.

8. A scraper for double disk grain drills having a: portion curved longitudinally and the rema ning portion substantially fiat and having a notch formed at" one 'end for the reception of a drag chain and a longitudinal recess at its opposlteI end.

59. In combination, a grain drill boot hair: ng a rearwardly extending portion and an inwardly extending bearing stern, saidbearing stem beingreces's'ed toward 1t-S O 1 1Q6'I1d and havingadpistable scrapers secured: on

.its other end,- and said rearwardly'eXt-ending portion having secured thereto at its rear end a resilient scraper provided with a bifurcated free end. V r V v f i' 10. In 'combination a grain drill boot having a rearwardly extending portion and a scraper secured to said rearwardly extending portion having: integral laterally iresillent portionsfat its free end." f s 11. In combination, rai grain drillboot having a rearwardly extending portion and a'scraper adjustalolysecured to saijd rear said. scraper spaced from p the extreme rear end or said rearwardly eg tendin portionof ,wardly extending portion with'a porti n or ing a curved tailportion and a scraper secured to said tail portion and having a longitudlnally curved portion, the radius of curvature of the tail portion of said boot being shorter than the'radius of curvature 20 of the curved portion of said scraper.

15. In combination, a grain drill boot, a resilient scraper blade having lateral edge portions resiliently yieldable in a plurality of directions at right angles to each other 25 l and means for rigidly clamping said scraper blade to said boot.

In testimony whereof I aflix my signature.

- HARRISON B. BOZARD. 

